简介:AbstractWe conducted environmental surveillance to detect avian influenza viruses circulating at live poultry markets (LPMs) and poultry farms in Guangxi Autonomous Region, China, where near the China-Vietnam border. From November through April 2017-2018 and 2018-2019, we collected environmental samples from 14 LPMs, 4 poultry farms, and 5 households with backyard poultry in two counties of Guangxi and tested for avian influenza A, H5, H7, and H9 by real-time reverse transcription-polymerase chain reaction (rRT-PCR). In addition, we conducted four cross-sectional questionnaire surveys among stall owners on biosecurity practices in LPMs of two study sites. Among 16,713 environmental specimens collected and tested, the median weekly positive rate for avian influenza A was 53.6% (range = 33.5% - 66.0%), including 25.2% for H9, 4.9% for H5, and 21.2% for other avian influenza viruses A subtypes, whereas a total of two H7 positive samples were detected. Among the 189 LPM stalls investigated, most stall owners (73.0%) sold chickens and ducks. Therefore, continued surveillance of the avian influenza virus is necessary for detecting and responding to emerging trends in avian influenza virus epidemiology.
简介:摘要:汽车白车身螺母凸焊技术是汽车零部件制造过程中重要的一环,如何实现多钟不规则工件的螺母凸焊对于汽车生产中十分重要。螺母凸焊技术是汽车白车身制造过程中一项关键制造工艺,采用凸焊工艺焊接螺母可以准确定位螺母焊接位置、提升焊接质量,相对二氧化碳气体保护焊更能减少有害气体对人的伤害。传统的螺母凸焊焊接工艺均是由手工放置螺母,这样不仅会导致生产过程中的效率低下,更严重的是手工放置易产生安全事故,而且如果是有多款工件多个位置需要凸焊生产,人工操作也会存在着漏焊或者错焊的风险。为此多种不规则工件的凸焊工艺就显得尤其重要。兼容式螺母凸焊设备能够改善对工人的操作技术要求,减少车间粉尘、焊接飞溅对操作人员健康的危害,同时也能把生产效率大大地提高。
简介:摘要 目的:探讨H2H营养管理模式在老年髋部骨折患者围手术期中的应用。 方法:纳入2022年1月~2022年12月本院创伤骨科收治并接受髋关节置换术的患者86例,随机分为两组,各43例。对照组予常规围手术期护理,观察组则在对照组基础上实施H2H营养管理模式。采用Harris评分量表对两组患者术前、术后1个月、术后3个月的髋关节功能进行评价和比较,采用患者主观全面评定量表(PG-SGA)评价并比较两组患者干预后的营养状况。 结果:两组患者术前的Harris评分相似,无统计学意义(P>0.05);实施H2H营养管理模式后,观察组患者术后1个月、术后3个月的Harris评分均显著高于对照组,观察组患者术后营养状况显著优于对照组,差异有统计学意义(P